GroundRosterPreston's Backhoe & Dozer ServiceLicensed
| Name | Preston's Backhoe & Dozer Service |
| Company | Ronnie Preston |
| License number | 604 |
| License type | Certified Installer |
| License status | Active - DEQ certified installer |
| Location | Ardmore, Oklahoma 73401 |
| Service area | Subsurface, Aerobic Spray |
| Phone | (580) 220-7669 |
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What this license covers
- Installation / repair: licensed to build and install septic tanks and drainfields, and to repair or replace failed ones.
How to verify this license
We publish this listing exactly as it appears in Oklahoma's official licensing records; we do not vouch for the business itself. Before hiring, look up license #604 directly with the state, confirm it is still active, and ask for a current certificate of insurance.
Source: Oklahoma DEQ - Certified Installers, last checked 2026-08-19. Verify at the official source.
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